I like to run road tar in mine, I like it STICK to the metal!!!
Na but I do run Mobil 1 full synthetic 10w-30 my car. 40k mines and after a quick wipe with a rag, you can eat off the valve covers. I spend most of my time over 5k rpms and have never had a problem (but then again it is a Toyota). I change my oil filter every 5k and the oil every 10k. I'm sold on synthetic!
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